In the book "The Great Tragedy of India's Partition" by S.S. Sharma. The idea of two-nation theory was also supported by the likes of Savarkar and Lala Lajpat Rai. The book is an essential read for those who want to learn more about this topic, and it methodically goes into the stages that led to the division of the country. Link to book review

Wrecked buildings after communal riots in Amritsar in 1947 - (c) Keystone Features

In this article " When Emperors turned on Gurus ", author Parvez Mahmood writes about the historical injustices suffered by the Sikhs that caused a growing rift between the two communities in Punjab. Excerpt ⓒThe Friday Times : The seeds of animosity between the two communities, Muslim and Sikh, that led to the eruption of such harrowing violence were planted three-and-a-half centuries earlier by an unfortunate episode during the unsuccessful rebellion of Prince Khusrau against his father, the newly enthroned Emperor Jahangir, and nourished by bloody events during the reign of Emperor Aurangzeb and later during the invasions of Ahmed Shah Abdali. As will be observed later in this article, the people of Punjab of all faiths had continued to live in peace with each other during those cataclysmic events in the 17th and 18th centuries and had suffered in equal measures at the hands of Turkic and Afghan invaders.